It is alleged that between Christmas Day 2010 and September 19 this year, they were preparing, or helping others prepare, to commit acts of terrorism.

For Nasser, from Sparkhill, Khalid, from Sparkbrook, and Ali, from Balsall Heath, this is alleged to have included planning a bombing campaign; stating an intention to be a suicide bomber; collecting money for terrorism; making or helping make a homemade bomb for terrorism; and recruiting people for terrorism.

Nasser and Khalid are also accused of travelling to Pakistan for training in terrorism including bomb making, weapons and poison making, as well as making a 'martyrdom' film.

Ahmed, from Moseley, is accused of helping others travel to Pakistan for terrorism training, collecting money for terrorism and investing and managing money for terrorist acts.

Ashik Ali's brother Bahader Ali, 28, and Mohammed Rizwan, 32, both from Sparkbrook, are both charged with failing to disclose information about acts of terrorism.

It is alleged that between July 29 and September 19 this year, both had information which they knew may help prevent the commission of an act of terrorism but did not disclose the information. Bahader Ali is also charged with terrorist fundraising. All six men will appear at West London Magistrates' Court.